**This Powerpoint specifically uses the Cambridge AS Level Biology Syllabus and covers all criteria for – Unit 15 Control and Coordination
**
Students will be able to -

1 describe the features of the endocrine system with reference
to the hormones ADH, glucagon and insulin (see 14.1.8, 14.1.9
and 14.1.10)

2 compare the features of the nervous system and the
endocrine system

3 describe the structure and function of a sensory neurone
and a motor neurone and state that intermediate neurones
connect sensory neurones and motor neurones

4 outline the role of sensory receptor cells in detecting stimuli
and stimulating the transmission of impulses in sensory
neurones

5 describe the sequence of events that results in an action
potential in a sensory neurone, using a chemoreceptor cell in
a human taste bud as an example

6 describe and explain changes to the membrane potential of
neurones, including:
• how the resting potential is maintained
• the events that occur during an action potential
• how the resting potential is restored during the refractory
period

7 describe and explain the rapid transmission of an impulse in a
myelinated neurone with reference to saltatory conduction

8 explain the importance of the refractory period in determining
the frequency of impulses

9 describe the structure of a cholinergic synapse and explain
how it functions, including the role of calcium ions

10 describe the roles of neuromuscular junctions, the T-tubule
system and sarcoplasmic reticulum in stimulating contraction
in striated muscle

11 describe the ultrastructure of striated muscle with reference
to sarcomere structure using electron micrographs and
diagrams

12 explain the sliding filament model of muscular contraction
including the roles of troponin, tropomyosin, calcium ions and
ATP

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**
Bring your Cambridge AS Level Biology lessons to life with our expertly designed teaching resources. Each unit is tailored to the latest syllabus, offering ready-to-use lesson plans, engaging experiments, and visually clear notes that save hours of prep time. Whether you’re new to the course or refining your approach, The Science Shelf gives you everything you need to boost student understanding and exam success — all in one place.